Answer: [tex]4.33\text{ cars per month.}[/tex]
Step-by-step explanation:
Given : Ervin sells vintage cars. Every three months, he manages to sell 13 cars.
[tex]m=\dfrac{\text{change in y}}{\text{change in x}}[/tex]
If time in months is along the x-axis and the number of cars sold is along the y-axis
Change in months : 3
Change number of cars : 13
The slope of the line that represents this relationship will be :-
[tex]m=\dfrac{\text{Change in cars}}{\text{Change in months}}\\\\=\dfrac{13}{3}=4.33333\approx4.33\text{ cars per month.}[/tex]
Hence, the slope of the line = [tex]4.33\text{ cars per month.}[/tex]
